Question: What is the Class IIIB combustible liquid with the highest flash point that is used in insecticides?
Paraphrase: What is the Class IIIB flamable liquid with the best flash point that is used in insecticides?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q21009059 . ?ent wdt:P2128 ?obj . ?ent wdt:P2868 wd:Q181322 } ORDER BY DESC(?obj)LIMIT 5 
Answer: parathion, ethion, malathion, phorate, propoxur